- ecto-
- edaphic
- effused
- eglandular
- ellipsoid
- elliptic
- emarginate
- embryo
- emetic
- emollient
- endemic
- endo-
- endocarp
- endosperm
- ensiform
- entire
- entomophilous
- ephemeral
- epi-
- epicarp
- epiderm
- epidermoid
- epigeal
- epipetalous
- epiphyte
- erect
- erecto-patent
- ex situ
- excentrical
- exine
- exocarp
- exsert
- exstipulate
- extra-axillary
- extrafloral nectaries
- extrorse
- exudate